DE2854109B2 - nail polish - Google Patents

Description

The invention relates to a thixotropic nail polish with a gel of particular composition dispersed therein.

It is well known that nail varnishes consist of film-forming compounds that gradually adhere at normal temperatures air dry. There are also known nail varnishes that are made using so-called organic modified montmorillonite clays are produced, which are non-aqueous gel formers.

The disadvantage of the nail polishes known hitherto is that their viscosity gradually increases over time For this reason, the nail polish bottles used in practice can often not be used up completely.

About the deposition or settling of pigments and so-called pearl essences from nail polish to prevent it is known, e.g. B. from US-PS 34 22185, the nail polishes using to produce modified montmorillonil clays.

From Japanese Patent 8 95 953 are further modified from an amine Montmorillonite clay, a swelling agent, e.g. B. orthophosphoric acid and compounds such as acetone, Isopropyl alcohol and butyl acetate, which are characterized by a polar group and have an affinity for have other components are known. In the case of these known nail polishes, the modified montmorillonite clay is simply incorporated into the nail polish base mixes, which is why the nail polish obtained only has poor pigment dispersion stabilities and has a low gloss. The reason for this is to be found in that the swelling agent and the dispersing power of the modified montmorillonite tones in nail polish are bad.

The known modified montmorillonite clays can be by binding of cationically active and polar organic compounds on the Montmoril Making lonite clay. The interlaminar distance of the Molecules of the modified montmorillonite clay can be removed by the action of a solvent, for example toluene, the montmorillonite clay swells in the solvent.

is ten montmorillonite clays in the form of a powder, see above agglomerates form. So that the montmorillonite clays develop their full effectiveness in nail polishes they must be finely divided and uniform let it disperse in the nail polish. With a simple one mechanical dispersion of a modified montmorillonite clay in a nail polish base, for example by means of a conventional dispersing device, the gloss and the transparency of the nail polish film obtained are due to the presence of particle ag- glomerates in the produced film are low.

Finally, in Known Japanese Patent Application No. 52-145528 / 77, a method is disclosed proposed for the preparation of a gel that is contained therein consists, by heating and compressing one organic

jo modified montmorillonite clay, nitrocellulose, usual plasticizers or plasticizers, e.g. Dibutyl phthalate, acetyl tributyl citrate and organic solvents that cause sufficient swelling of the lead organically modified montmorillonite clays, to mix with each other to produce a particulate mass, whereupon this into a mixture organic solvents are given. Will an in Gel produced in this way is used to produce a nail polish Nail polish has good pigment dispersion stability and good gel properties and it can be produce advantageous glossy paints, but the disadvantage of this process is that it is comparatively larger amounts of organic solvents rend the production of the paints evaporate and into the Environment.

The object of the invention was therefore a nail varnish with nail varnishes that are known in comparison improved properties, especially improved Viscosity properties, d. H. a viscosity that is Stabilized about a week after the nail polish was made and then no further over time increases, so that a nail polish bottle can be used up completely without difficulty.

The invention is based on the knowledge that organically modified montmorillonite clays are used by mixing with certain other ingredients, described in more detail below, by grinding the powdery clay with the others

e> o Ingredients processed into particulate products, for example by means of a roller mill Heating and compacting, the montmorillonite agglomerates can be deagglomerated, causing them uniform and in great fineness in a nail polish

M base can be dispersed, so that nail polishes can be produced, the lacquer layers provide excellent gloss, with a loss of gloss and a Reduction in the transparency of the nail

paint films due to the presence of agglomerated particles of organically modified montmorillonite clay is avoided.

The invention relates to a nail polish that is used in the features specified in the claims.

In view of the fact that it has hitherto been assumed that clay minerals have good gelling properties of nail varnishes, but on the other hand also act as matting agents, the effects achievable according to the invention must be regarded as surprising will.

It has been found that the good gel formation properties of organically modified montmorillonite clays then do not fully develop in nail varnishes can, if the tones cannot be penetrated by the im is Nail polish contained solvents in the microstructure of the clays sufficiently to swell will. Are the organically modified montmorillonite clays without the action of heat and When processed compacting, the microstructure of the organically modified montmorillonite clays cannot expand. As a result, such a particulate mass is added to a nail polish base, As a result, the thixotropic properties of the clay in the nail polish cannot be improved, although that The gloss of the varnish produced on the fingernail is good, no stable nail varnish obtained, and that's why not because the pigment particles in the nail polish tend to deposit and settle on the bottom of the nail polish Put down the nail polish container.

The invention thus avoids the disadvantages of the older method described in Japanese patent application 52-145528 / 77, since the use of non-volatile substances with a comparatively high boiling point, which bring ten montmorillonite clay to swell, made possible

Examples of compounds (C) which can be used according to the invention and which cause the organically modified montmorillonite clay to swell are: ίο

(1) Compounds of the general formula:

HO (RO) _1n H,

wherein R is a radical of one of the formulas —C2H4— and —CiHe- and m is a number from 3 to 90, e.g. B. polyethylene glycols, preferably with an average molecular weight of about 300 to about 4000 and polypropylene glycols, preferably with an average molecular weight of about 300 to about 5000;

(2) Compounds of the general formula:

RO (RO) Jf.

where R is a radical of one of the formulas —C2H4— and -C ₃ He-, R 'is an alkyl radical having 4 to 20 carbon atoms and m is a number from 1 to 50, for example polyoxyethylene lauryl ether with about 8 to about 15 added Ethylene oxide units and polyoxyethylene stearyl ether with about 9 to 15 added Λ ethylene oxide units and

(3) Esters of dicarboxylic acids with 4 to 10 carbon atoms and aliphatic short-chain alcohols with 1 to 4 carbon atoms, for example diethyl adipate and oibutyl sebacate.

Individual compounds or mixtures thereof can be used.

Such compounds not only have the property of organically modified montmorillonite clay to cause swelling in the particulate mass, but also the property that it is nitrocellulose able to plasticize.

It has been shown that the focus lies of component (A) at less than 25% by weight, a particulate mass with sufficient gelation or does not retain gel-forming properties. If the concentration of component (A) is above 70 % By weight, again core particulate material can be obtained. On the other hand, there is concentration of component (B) at less than 5% by weight, so leaves no mass is preserved in the form of particles. If the concentration of component (B) is above 70 Wt .-%, then again a particulate mass which is characterized by inadequate gelling or gel-forming properties. Furthermore, even then, no particulate can be obtained Products obtained if the component (Q in a concentration of less than 5% by weight or in a Concentration of more than 30% by weight is present

The customary known organically modified montmorillonite clays can be used to produce the gels according to the invention, for example Dimethylbenzyldodecylammonium montmorillonite and

Dimethyldioctadecylammonium montmoriUonite Modified montmorillonite clays which can be used according to the invention are commercially available.

For the production of the gels and nail varnishes according to the invention, customary known ones can also be used Use nitrocelluloses, commonly known in nail polishes, as film-forming ingredients be used. Typically, nitrocelluloses, for example, can thus be used, which under the Type designation »'/ * seconds« and »' / 2 seconds« are known.

In the case of the particulate matter disclosed in the aforementioned Japanese Patent Application No. 52-145528, significant amounts of solvents are evaporated on the mixing rollers during the mixing operation

In contrast to this, the component (Q in the case of the particulate mass used according to the invention remains after the mixing or grinding process in such a shape that it is between the organically modified montmorilbnite clay molecules The layers formed are able to penetrate and cause the clay particles to swell Procedural stage, d. i.e., the stage in which the particulate mass is dissolved and dispersed in a mixture of organic solvents, the solvent mixture can easily penetrate into the swollen montmorillonite clay, so that a gel is obtained which has a sufficient amount of the solvent mixture. This shows that the organically modified montmorillonite clay is still in the swelling state in the gel Gel has good gel-forming properties and there is neither separation nor settling of pigments and Pearl essences. Furthermore, since the organically modified montmorillonite clay is in finely divided form as a result of the grinding process, it can be strong get shiny nail polishes.

The swelling power and softening effect of the compounds that cause organically modified montmorillonite clays to swell and nitrocellulose softening are given in Table 3 below.

To determine the swelling force of the in table 3

These compounds were separated from each other with dimethylbenzyldodecylammonium montmorillonite clay and nitrocellulose »Ά second« in the mixing ratio (I) given in Table 1 mixed with one another, whereupon the mixtures under Using grinding rollers subjected to a grinding treatment and produced particulate masses became.

The so-called interlaminar distance (00 1 area) of the organically modified montmorillonite clays in the mass, was made using a device for Determination of X-ray diffraction determined

Table 1

10 It was found that the interlaminar distance of the investigated dimethylbenzyldodecylammonium montmorillonite clay was 9.4 Α units and that Dibutyl phthalate does not extend the interlaminar distance of the organically modified montmorillonite clay able.

In the case in which a compound exhibited sufficient swelling force, however, a comparatively low softening or plasticizing effect Kraft, the mixture ratio (II) was applied. The results obtained are in the following later Table 3 compiled

Mixing ratio I

Wt%

Mixing ratio II

Wt%

Montmorillonite Clay Nitrocellulose » ^! / ₄ second «substance according to table 3

Montmorillonite clay Nitrocellulose »V4 second« Dibutyl phthalate Substance according to table 3

47 31 10 12th

The plasticizer effect was determined as follows: In the manner described, using the compounds to be tested, particulate Prepared masses The obtained masses were then in the form of films with a thickness of 0.175 mm applied to a glass plate. After one hour, the hardness of the films produced was determined using a conventional Hardness tester determined The test conditions were as follows: load 100 g, film thickness 0.175 mm for a Load duration of 5 seconds in accordance with Japanese Industry Standard: B-7774. the The results obtained are summarized in Table 3 below. The hardness value increases when the film hardness decreases

Table 2 Nitrocellulose "V2 second" 15% by weight

modified alkyd resin 15% by weight

Solvent mixture of 48% butyl

acetate, 38% toluene, 10% ethyl acetate

and 4% n-butyl alcohol 65% by weight

J5 substance according to table 3 5% by weight Table 3

Substance (sample)

Mixed race interlaminar hardness of the ratio distance (Ä) feet

1 polyethylene glycol KM.W. 200)

2 polyethylene glycol (M. W. 300)

3 polyethylene glycol KM.W. 400)

4 polyethylene glycol KM.W. 600)

5 polyethylene glycol (M.W. 1000)

6 polyethylene glycol (M. W. 1500)

7 polyethylene glycol (M. W. 4000)

8 polyoxyethylene lauryl ether (Ä.O .. number of added molecules:

9 Polyoryethylene lauryl ether (Ä. O., number of added molecules:

10 polyoxyethylene lauryl ether (Ä.O., number of added Molecules: 15)

11 polyoxyethylene stearyl ether (Ä.O., number of added Molecules: 9)

12 polyoxyethylene stearyl ether (Ä.O., number of added Molecules: 15)

13 diethyl adipate

14 dibutyl sebacate

15 ') Ethylene, lycol monobutyl ether

16 ') benzyl alcohol

17 ') liquid paraffin

18 ') I'olyoxyethylcnoleyliithcr (Λ.Ο .. number of added molecules:

I. 2) Il 22nd 189 I. 25th 185 I. 25th 183 I. 21 172 il 20th 171 11th 18th 167 Il 15th 153 8th) 18th 128 9) 17th 135 14th 147 20th 216 16 143 22nd 155 19th 174 26th 85 2K Xl 12th s: < 14th 94

(• 'orlscl / ung

Substance (sample)

19 *) butyl carbitol acetal

2O ⁺ ) diisopropyl adipate

2I ⁺ ) diisobutyl adipate

22 ⁺⁾ Dibutyl phthalate

23 *) acetyl tributyl citrate

^f ) = comparative examples

The substances usable as (C) should have an interlaminar distance of not less than about 16 Å and have a Vickers hardness of not less than 110. Compounds such as, for example, Ainyieriglykolmonobutyläther and benzyl alcohol, which have an interlaminar distance of not less than 16 Å therefore cannot be used as component (C) for the production of the particulate mass, since they have a high hardness, d. H. a Vickers hardness of less than 110 unless such Compounds used in combination with customary known plasticizers or plasticizers are, for example dibutyl phthalate. On the other hand, compounds such as butyl carbitol acetate can be used and diisobutyl adipate, which have an interlaminar distance of less than 16 Å, not as Use component (C) to prepare the particulate mass.

The grinding or mixing of components (A), (B) and (C) can be carried out by customary known methods, such as those used, for example, in the field of paints and varnishes, the rubber industry and the like. Usable are, for example, conventional roller grinding devices or roller mixing devices, Bunbury mixers, so-called colloid mills and the like, with which various components can be mixed or kneaded with compression or compression, for example at temperatures of about 40 to 70 ^° C.

A gel according to the invention for the production of a nail varnish can be produced in a simple manner by mechanically mixing 10 to 30% by weight of the particulate mass or "chip mass" with 70 up to 90% by weight of an organic solvent mixture. The concentration lies on the particulate If the mass is less than 10% by weight or more than 30% by weight, gels, the nail varnishes, are obtained that do not have a suitable viscosity. Lies

Table 4

(Numerical value in Ge \ v .-%)

Mix Interlaminar Märte des relationship Distance (A) F'ilmes I. 13th 164 I. 13th 129 I. 13th 129 I. 10 118 I. 10 118

on the other hand, the concentration of the mixed solvent is less than 70% by weight or more than 90% by weight. no nail polish can be used with a suitable Vrskusiiäi hci'äicücii.

For the production of gels and nail varnishes according to the invention, those customarily used for production can be used Use solvents used by nail polishes. Examples of suitable solvent mixtures are Mixtures of (a) at least one solvent from the group of toluene. Xylene and isoparaffin; (b) at least a solvent from the group: butyl acetate. Ethyl acetate, methyl ethyl ketone, methyl isobutyl ketone. Tetrahydrofuran and ethylene glycol monoethyl ether as well (C) at least one solvent from the group consisting of ethyl alcohol. Acetone and isopropyl alcohol.

As already stated, there is conventional nail lacquers with organically modified montmorillonite clays the general tendency for the viscosity of the nail polish to gradually increase over time. As a result, the known commercially available nail varnishes are often not completely used up can be. In order to avoid such a gradual increase in viscosity, comparatively high concentrations of a polar solvent or solvents can be used, such as for example butyl acetate. Ethyl acetate. Methyl ethyl ketone and methyl isobutyl ketone. However, it has been shown that even if larger concentrations of such polar solvents are used, the viscosities the nail polish does not remain stable over a long period of time. Furthermore, a Syneresis of the gel. d. H. a contraction of the gel on. which negatively affects the properties of the nail polish over time.

The change in viscosity and the stability of the nail polishes of various compositions, as indicated in Table 4, examined.

The results obtained are shown in Table 5 below.

Nail polish no. 12th 2 12th 12th 4th 12th 12th 1 12th 12th 12th 12th 12th Nitrocellulose 5 S. 5 5 5 Modified Alky1h; irz 1 1 1 1 1 Acetyitributyl citrate 0.5 0.5 0.5 0.5 0.5 Organically modified montmorillonite clay Fisenoxidniamenl

9 28 54 109 0.1 2 0.1 10 3 0.1 Paint No. 4 4th 0.1 5 0.1 ■ j KoriNtft / ung 25th 15th 5 Viscosity stability 21 17 i Stability ■! Nail polish no 34.4 44.4 34.4 38.4 42.4: i I. 10 10 10 10 10 ν Titanium dioxide - - - 4th 8th Tol'jol 100 100 100 100 100 Butyl acetate Ethyl acetate in dependence of the composition of the Solvent in Ethyl alcohol All in all Paint No. 3 Paint No. 5 Table 5 and ciel stability Stability viscosity stability viscosity Change in viscosity Nail polishes Paint No. 2 Period of paint no. I Stability viscosity )
viscosity

0 700 0 1220 0 1780 0 1200 0 1730 0 1 day 1070 0 1540 0 2070 0 1480 0 1970 0 1 week 1050 0 1840 0 2180 1 1800 0 2090 -1 2 weeks 1980 0 2010 -1 2200 -2 2070 -1 2110 -2 I month 2510 0 2130 -2 1990 -3 2200 -2 2030 -3

"') = Centipoise.

* ^:) = Ciel stability, assessed according to the following criteria: 0: No separation was observed.

- 1: Slight separation was observed. -2: Separation was clearly visible.

- 3: Considerable separation was found.

In organically modified montmorillonite clays, organic cations are ionically bound by the surfaces of the clay minerals, which are negatively charged. The best conventional gels or gel compositions contain '/ j to Uj as many polar additives (e.g. ethyl alcohol and acetone) as the amount of the organically modified montmorillonite clay and tens of times the amount of the organically modified montmorillonite clay of non-polar ones Solvents, e.g. B. toluene and xylene, the polar additives are attracted by the hydrophilic groups on the surface of the montmorillonite clay, whereby the organic cations of the hydrocarbon chains, which are originally present on the surface of the organically modified montmorillonite clay, are displaced from the surface. As a result, the interlaminar distance of the montmorillonite clay is somewhat increased and a gelation reaction is initiated. On the other hand, the hydrocarbon chains displaced from the surface of the montmorillonite clay have a good affinity for solvents such as toluene, xylene and the like. If, as a result, a larger amount of such solvents is incorporated into the gel, the hydrocarbon chains are increasingly displaced from the surfaces of the montmorillonite clay and the interlaminar distances of the montmorillonite clay are extended more and more. As a result, gelation is accelerated. Solvents such as ToIujI, xylene and the like, which are present in the solvent mixtures that are commonly used for the production of known nail varnishes, accelerate

■ r. gene gelation, v / o on the other hand alcohols, ketones and the like that are present in the solvent mixtures that are normally more conventional for preparation Nail polishes are used to initiate the gelation reaction. In the case where the mixing ratio

if the latter is increased in the solvent mixture, the speed of gel formation becomes greater and the subsequent gelation is slightly accelerated. As a result, let see nail polishes where the Viscosity does not noticeably increase over time,

" produce. In the case of these nail polishes, however, where only the hydrocarbon chains are present in the interlaminar fractions of the montmorillonite clay the polar solvents tend to separate out of the gel system and over time they will Syneresis of the gel.

In contrast, according to the invention, since the above-mentioned component (C) with a polar Property is in a stable state, together with the hydrocarbon chains in the

b5 interlaminar sections of the organically modified Montmoriilonite Tones, as evidenced by X-ray diffraction has been confirmed the polar solvent, even if large amounts of polar solvents

are used to enter the interlaminar sections of the montmorillonite clay due to the Attraction of the polar component (C). As a result, the aforementioned component (C) of the particulate acts Mass or chip composition not only as a plasticizer for the nitrocellulose, but also rather also as a gelling initiator for the organically modified M ^ ntiiiorillonite clay. Thus becomes a gel according to the invention for producing a nail varnish used, nail varnishes are obtained which are characterized by good gelling properties without an increase in viscosity over time. Furthermore, there is no separation or no settling, even if a comparatively large amount of polar solvents is used to make the nail polish.

A nail varnish according to the invention is thus made up of a gel of the composition described and the rest of the other ingredients commonly used to make nail polishes. These include nitrocellulose, polymers or resins such as alkyd resins and acrylic resins, plasticizers or plasticizers, such as dibutyl phthalate and acetyl tributyl citrate, as well as solvents, such as butyl acetate, ethyl acetate, isopropyl alcohol, n-butyl alcohol, toluene, xylene and the like, also pigments, such as titanium oxide, iron oxides and the like, pearl essences, Dye, UV absorber and the like. Although different in a nail varnish according to the invention Gel concentrations can be present, but it has proven to be particularly advantageous if for production of a nail varnish according to the invention about 5 to about 20% by weight of gel, based on the total weight of the nail polish can be used. If less than 5% by weight of gel is used, the advantages sought according to the invention are not fully achieved. In contrast, gel concentrations of more than 20% by weight used, the application properties of the nail varnish on the fingernails be adversely affected.

The invention also makes it possible to use aromatic hydrocarbons, such as toluene and xylene, which have to be used for the production of conventional nail polishes, too waive. This achieves a particular advantage of the nail polish, since such aromatic hydrocarbon solvents cause problems when using nail polishes with such aromatic hydrocarbon solvents like toluene and / or xylene, it is often applied to comparatively weak fingernails as the fingernails become brittle and fragile over time and so do the fingernails be attacked by an onychoschisis.

The following examples are intended to further illustrate the invention. The ones given in the examples Percentages relate to percent by weight, unless otherwise stated

example 1

Composition of the particulate mass

(Chip mass)% Dimethylbenzyldodecylammonium mont-

morillonite 47

Nitrocellulose »Ά second« 41

Polyethylene glycol (M.W.300) 12

A total of 100

18% of the mixture prepared in the manner described was then mixed with 82% of a solvent mixture mixed with the following composition:

Composition of the solvent mixture%

Isopropyl alcohol 19

Toluene 39

n-butyl acetate 42

A total of 100

The particulate mass was in the solvent mixture to produce one of the invention Geles dissolved and dispersed.

Example 2

Another gel was made from 18% of the particulate mass indicated below and 82% of the im The following specified solvent mixture prepared according to the method specified in Example 1.

A particulate mass, a so-called chip mass, was prepared by mixing the ingredients listed below, and the mixture was then milled using a two-stage roller mixer with heating and compression. The surface temperature of the first roll was 40 ⁰ C and the Oberflächentemper & rar the second roll at 6O ⁰ C

Composition of the particulate mass % (Chip ground) Dimethylbenzyldodecylammonium mont- 48 morillonite 42 Nitrocellulose »'/> second« Polyethylene glycol 10 (added units of ethylene oxide: 9) 100 All in all % Composition of the solvent mixture 18th Isopropyl alcohol 38 toluene 44 n-butyl acetate 100 All in all

Example 3

Following the procedure described in Example 1, another gel was made from 18% of a particulate Mass with the composition given below and 82% of a solvent mixture of im the following specified composition prepared

60

Composition of the particulate % Dimensions Dimethyloctadecylammonium 47 montmorillonite 40 Nitrocellulose "/ 2 seconds" 13th Diethyl adipate 100 All in all % Composition of the solvent mixture 17th Isopropyl alcohol 45 toluene 38 n-butyl acetate 100 All in all

Example 4

Following the procedure described in Example 1, another Ge! from 18% of a particulate Mass of the composition given below and from 82% of a solvent mixture of

prepared in the following composition.

The results obtained are shown in Table 6 below.

Dimensions Vo Table 6 shine
/ 0 / λ * 11 transparency Dimethylbenzyldodecylammonium
montmorillonite 47 ( / «) I. ("'»)) Nitrocellulose »Ά second« 41 Polyethylene glycol (MW 300) 12th 73.8 87.0 All in all 100 _{| (|} Example 1 72.2
69.1 85.4
76.6 Composition of the solvent mix % Example 2
Example 3 70.3 77.7 n-butyl acetate 43 Example 4 2.4 30.9 Isopropyl alcohol 18th Comparative example I 73.9 86.6 Isoparaffin 21 , - Comparative example 2 Tetrahydrofuran 18th icle were made using a dosing device All in all 100 ¹ ') The various C

Comparative example 1

In a solvent mixture of 15% isopropyl alcohol, 32.0% toluene and 34.4% n-buty lacelai were used 73% nitrocellulose dissolved "/ 4 seconds", followed by the Solution 2.2% polyethylene glycol (M. W. 300) and 8.5% dimethylbenzyldodecylammonium montmorillonite were added became. A uniform gel was obtained after mixing.

Comparative example 2

Following the procedure described in Example 1, a gel was formed from 18% of a particulate mass the composition given below and 82% of a solvent mixture of the im the following specified composition prepared.

Composition of the particulate

Mass %

Dimethylbenzyldodecylammonium

montmorillonite 44

Nitrocellulose "/ <second" 40

Dibutyl phthalate 16

Total 1 00

Composition of the solvent mixture%

Isopropyl alcohol 19

Toluene 39

n-butyl acetate 42

A total of 100

Thus, a gel was prepared as described in Example 1, with the exception, however, that the Polyethylene glycol was replaced by a common plasticizer, namely dibutyl phthalate.

The gels, prepared as described in Examples 1 to 4 and in Comparative Examples 1 and 2, were examined for their luster and transparency. the

Table 7

(Numerical values in weight- "A)

Direction under Hr / Cuiiine uniform films; inl clear polyvinyl chloride films applied. The surface gloss of the films produced was determined using the mirror method (angle of incidence 60 °, angle of reflection 60 °). As a basis for determining the gloss value, the transparent polyvinyl chloride film was assigned a gloss value of 100%.

^f2 ) To determine the transparency, a uniform film of the gel to be examined with a layer thickness of 0.425 mm was applied to a clear polyvinyl chloride film by means of a metering device. The transmittance or transparency of the sample was then determined using a specrophotometer. The wavelength of the light used for the determination was 520 µm. The specified transparency values relate to a transparency of 100% for the clear polyvinyl chloride film.

As can be seen from Table 6, the gloss and transparency values of the gels according to the invention are better than the corresponding values of Comparative Example 1. As in the case of Comparative Example 2, roller treatment the gloss and transparency values are also good.

Examples 5 to 8
as well as comparative examples 3 and 4

Under Verwci in Examples 1 to 4 and

Gels prepared in Comparative Examples 1 and 2 nail varnishes were produced in the usual known manner, the following table 7 specified mixing ratios were used.

The nail varnishes produced were then examined for their change in viscosity and gel stability (Separation and settling) as well as their shine, that when the nail polish is applied to a fingernail was obtained. The results obtained are shown in Table 8 below.

component

example

Comparative example
3 4

Nitrocellulose 12th 12th 12th 12th Modified alkyd resin 12th 12th 12th - Acrylic resin - - - 12th Acetyl ributyl citrate 5 5 5 5

12th

15th

16

continuation

component

Example 5

Comparative example 4

Methyl ethyl ketone

n-butyl acetate

Ethyl acetate Ethyl alcohol

n-butyl alcohol toluene

Iron oxide pigment Titanium dioxide Pearl essence

Gel according to

example 1 Example 2 Example 3 Example 4 Comparative example 1

Comparative Example 2 Overall

Table 8

- 12th - - - - 32.4 20.4 32.4 32.4 32.4 32.4 16 16 16 16 16 16 4th 4th 4th 4th 4th 4th 2 2 2 2 2 2 0.5 0.5 0.5 0.5 0.5 0.5 0.1 0.1 0.1 0.1 0.1 0.1 4.0 4.0 4.0 4.0 4.0 4.0

12th

12th

12th

12th

100

100

100

100

Example No. Change over time Gloss

0 1 day 1 week 2 weeks 1 month 2 months 3 months (%)

Example 5 Viscosity * ¹ ) Separation * ² ) Settling * ² )

Example 6 Viscosity Separation Settling

Example 7 Viscosity Separation Settling

Example 8 Viscosity Separation Settling

Comparative example 3 viscosity

separation

Settling comparative example 4

viscosity

separation Sit down

^{+ l} ) «■ Values given in centipoise.

⁺² ) = 0 - Out; - 1 = Mäöig; - 2 = bad; - 3 = very bad.

1380 1690 1800 1820 1780 1820 1820 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1510 1840 1990 2000 1970 2020 2000 0 0 0 ' 0 0 0 0 0 0 0 0 0 0 0 1470 1710 1880 1880 1820 1890 1870 0 0 0 0 0 0 0 0 0 0 0 0 0 0 970 1140 1300 1310 1280 1280 1330 0 0 0 0 0 0 0 0 0 0 0 0 0 0 200 200 200 200 200 200 200 0 -1 ~ * 1 -2 -3 -3 -3 0 -2 -3 -3 -3 -3 -3 200 270 740 940 870 740 705 0 0 0 0 -2 -2 -3 0 0 -1 -1 -2 -2 -3

Since the gels, prepared as described in Betpiele 1 to Λ , contain a polar substance as a gelation initiator, ie component (Q, in the nail varnishes of Examples 5 to 8, which contained such a gel, an increase in the viscosity of the nail varnishes was observed The lapse of time was not observed and the gel stability was excellent in any case. In contrast, the nail varnishes of Comparative Examples 3 and 4, which were prepared using the gels of Comparative Examples 1 and 2, did not exhibit thixotropic properties, causing the pigments and pearls to settle The reason for this is to be seen in the fact that the gel of Comparative Example 1 was not subjected to any milling treatment, since an organically modified montmorillonite clay as well as nitrocellulose and the polar component (Q) were used to produce the gel In the case of Comparative Example 2, the gel was made using a conventional plasticizer ers, ie using dibutyl phthalate instead of the Kompoücäte (Q manufactured, which can cause the organically modified momtmorfllonit clay to swell.

Describes in Example 8, of a nail varnish which is not a usual aromatic hydrocarbon solvent such as toluene or xylene containing follows that if no aromatic hydrocarbon solvent is present in the nail polish, a good gel stability is obtained, and that further an increase in viscosity of the nail polish in the course of Time is not observed

Regarding the gloss of the nail polishes, it should be noted that good results have been achieved with With the exception of the nail varnish of Comparative Example 3, which was prepared using the gel of Comparative Example 1, which was not subjected to any grinding treatment was subjected.

It is known that when the mixing ratio of the polar solvent in nail polish increases that thixotropic properties of the nail polish can be improved in an advantageous manner.

This means that a nail polish according to the invention has the further advantage that the coating properties of the same are good and that the nail polish applied evenly and identically to the surface of a fingernail using an application brush can be.

In order to illustrate the thixotropic properties of nail varnishes according to the invention, the The ratio of the viscosity of the nail varnish at six revolutions per minute to the viscosity of the nail varnish at 60 revolutions per minute is determined The results obtained are shown in Table 9 below

Table 9 Example no. Comparative example

5 6 7 5

4.3 4.2 4.2 2.9

Viscosity at 6 revolutions per Minute / viscosity at 60 revolutions per minute

The viscosity was measured using a conventional viscometer B type manufactured by Tokyo Keiki Seizosho, Tokyo, there is at a temperature of 30 ⁰ C As shown in Table 9, show nail varnishes according to the invention good thixotropic properties.

The nail varnish of Comparative Example 5 was prepared in the manner described in Example 5, with the The exception, however, is that a mixture of 25.4% n-butyl alcohol, 6% ethyl acetate, 2% n-butyl alcohol and 21.0% toluene was used as the solvent.

After a safety test was carried out, it was found that the nail varnishes according to the invention were safe Fingernails can be applied.

In the case of the nail varnish from Example 5 (without extra toluene) and in the case of Comparative Example 5 Skin compatibility tests (with a large amount of toluene) were also carried out on guinea pigs. The nail polishes were applied daily applied to guinea pig skin for a period of 10 days. None Change in the skin in the case of the nail varnish from Example 5. In the case of the nail varnish from Comparative Example 5, however, this occurred after just 5 days the first application of the nail polish in the skin cracks and a desquamation.

Claims (2)

Patent claims: 1. Thixotropic nail polish with a disperse Gel from: (1) 10 to 30% by weight of a particulate mass, produced by mixing under the action of heat and with compression of (A) 25 to 70% by weight of an organically modified montmorillonite clay, (B) 5 to 70% by weight nitrocellulose and (C) 5 to 30% by weight of at least one compound of the general formula: HO (RO) _m H, where R is a radical of one of the formulas: —C2H4— or —CsHe- and m is a number from 3 to 90, at least one compound of the general formula: RO (RO) _n H. where R is a radical of one of the formulas —C2H4— or —C ₃ H ₆ -, R 'is an alkyl radical having 4 to 20 carbon atoms and π is a number from 1 to 50, and / or at least one ester of a dicarboxylic acid with 4 to 10 carbon atoms and an aliphatic short-chain alcohol with 1 to 4 carbon atoms and (2) 70 to 90% by weight of an organic solvent mixture. 2. Thixotropic nail polish according to claim 1, characterized in that at least part of the solvent used for its preparation consists of a non-aromatic solvent